“入芝兰之室，久而不闻其香”属于（）。A．感觉对比 B．错觉　 C．感觉阈限　 D．

—What would you send to your sister as the Christmas gift?  

—I haven't decided yet .I     _   send her a handbag.    [ ]

A. shall        

B. may        

C. must

对分组数据计算加权算术平均数时，其平均数值会受到（）等因素的影响。

A.组内极差

B.极端值

C.组内标准差

D.各组数值大小

E.各组频数多少

For the sake of your health, I’d rather you ___ a flat in the mountain than ___ in downtown area as the transport is getting more convenient.  

A．bought, one

B．to buy, that

C．bought, the one

D．to buy, what

治病八法不包括

A．补法
B．泻法
C．汗法
D．吐法
E．消法

长期每日口服2g以上大剂量维生素C，对人体产生的主要影响为（）

A.铁吸收不良

B.白细胞杀菌能力增强

C.引起泌 * * 结石

D.免疫功能下降

E.还原作用降低